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CVE-2016-2572

Status: ModifiedHigh (7.5)—

http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Squid-cache — Squid

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2016-2572",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2016-02-27T05:59:06.797",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html",
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    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2600.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2016/02/26/2",
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    },
    {
      "url": "http://www.securitytracker.com/id/1035101",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.squid-cache.org/Advisories/SQUID-2016_2.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.squid-cache.org/Versions/v4/changesets/squid-4-14548.patch",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/201607-01",
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html",
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    },
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    },
    {
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    },
    {
      "url": "https://security.gentoo.org/glsa/201607-01",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response."
    },
    {
      "lang": "es",
      "value": "http.cc en Squid 4.x en versiones anteriores a 4.0.7 confía en el código de estado HTTP después de un fallo de respuesta de análisis, lo que permite a servidores HTTP remotos provocar una denegación de servicio (fallo de aserción y salida de demonio) a través de una respuesta mal formada."
    }
  ],
  "lastModified": "2026-06-17T00:44:19.513",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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            },
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            },
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              "matchCriteriaId": "6640F25F-CC8B-4B05-A97A-2186BD0B5ED8"
            },
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            },
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            }
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          "operator": "OR"
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  ],
  "sourceIdentifier": "cve@mitre.org"
}